1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alisha [4.7K]
3 years ago
5

Raphael is twice as old as his sister. The sum of their ages is less than 30. What is the greatest age Raphael sister can be?

Mathematics
1 answer:
Sonja [21]3 years ago
7 0

Answer:

10

Step-by-step explanation:

I plugged in different numbers.

10*2 is 20

20+10=30

You might be interested in
A cone has a height of 20 centimeters and a volume of 4,710 cubic centimeters. What is the area of the base of the cone?
olchik [2.2K]

Answer:

706.5 cm^2

Step-by-step explanation:

First we need to find the r to find the area of the base which is the circle so we use the volume to find r

V = 1/3πr^2h now adjust the equation for r

r = √3V/πh

r = √3(4710)/20π

r= 15

now that we have r, the base of cone is a circle so we use the area formula for circle

area  = πr²

area = 3.14 (15)^2

area of base = 706.5 cm^2

4 0
3 years ago
Can someone please help
Natasha_Volkova [10]

Answer:

-6 degrees F

Step-by-step explanation:

We start with -8F as the temperature. It fell 10 degrees to 2F, then fell 8 degrees to -6F.

8 0
3 years ago
Read 2 more answers
The equation y=-7x-5 and the solution of (-2,9)
Black_prince [1.1K]
Y=-7x-5 
9=-7(-2)-5
9=14-5
9=9
Please mark the brainliest, if you think i helped!
8 0
4 years ago
the perimeter of a rectangle is 50 inches. The length of the rectangle is 10 inches. What method can be used to find the width o
Vinil7 [7]

Answer:

P= 2(l+w)

50=2(10+w)

50=20+2w

50-20=2w

30=2w

w=15

5 0
3 years ago
Simplify the surd 3√ 20 +√ 45 ​
melisa1 [442]

Answer:

9\sqrt{5}

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

Simplify the radicals

\sqrt{20}

= \sqrt{4(5)}

= \sqrt{4} × \sqrt{5}

= 2\sqrt{5}

\sqrt{45}

= \sqrt{9(5)}

= \sqrt{9} × \sqrt{5}

= 3\sqrt{5}

Then

3\sqrt{20} + \sqrt{45}

= 3(2\sqrt{5} ) + 3\sqrt{5}

= 6\sqrt{5} + 3\sqrt{5}

= 9\sqrt{5}

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is the volume of this cylinder in terms of Pi?
    9·1 answer
  • Mr.Trane puts some stickers in three rows. There are two stickers in each row. How many stickers does Mr.Trane have?
    15·2 answers
  • What is the relationship between two horizontal line
    7·1 answer
  • I know i chose an answer but pls answer
    15·1 answer
  • A linear function contains the following points.
    7·1 answer
  • 3. The Statue of Liberty is 305 feet tall. Lisa has a replica that is 9 inches tall and the
    14·1 answer
  • Solve the inequality. -2(2x + 2) ≥ −4x − 12
    7·1 answer
  • What is the correct scientific notation ?
    8·2 answers
  • Solve: 0 = 2x^2 + 16x
    8·1 answer
  • What numbers have been drawn the most in powerball
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!